Stop motion for bobbin winders



- P. NATHANSON STOP MOTION FOR BOBBIN ,WINDERS Apr. 24, 1923.

Filed April- 15, 1922 2 Sheets-Sheet 1 (ya wanton 33 466 abhor/140 13 I Apr. 24, 1923.

1,452,924 P. NATHANSON I STQP MQTID'N FOR BOBBIN WINDERS Filed April 15, 1922 v 2 sheets-shed 2 fatented W23.

@FFICLEL.

PHILIP NATHANSON, or aLLEiv'rowN, PENNSYLVANIA.

STOP MOTION FOR BOBIBIN WINTERS.

Application filed April 15, 1922. Serial No. 552,892. I

To all whom it may concern:

Be it known that I, PHILIP NATrIAnsoN, a citizen of the United States, and a resident of Allentown, county of Lehigl1,-and State of Pennsylvania, have invented a new and useful Stop Motion for Bobbin WVinders, of

which the following is a specification.

W'hile applicable to bobbin winding mechanism generally, my invention is designed more particularly for use in conjunction and arrangement of parts and appurtenances described and claimed, and a distinctive feature being the provision of brake means actuated directly by the yarn mass as deposited on the bobbin in such manner that a full bobbin releases itself from further rotation, all as hereinafter fully set forth.

In the accompanying drawings,

Fig. 1, is a'more or less diagrammatic representation of a vertical section of a winding frame such as is well known in the art, showing the application thereto of one of my automatic yarn wind stop attachments,

Fig. 2, is an elevation of a bobbin spindle, with a bobbin thereon shown in section;

Fig. 3, is a top view of one of my automatic yarn mass bobbin stop attachments as positioned in Fig. 1;

Fig. at, is a perspective view of one of my automatic yarn mass stop attachments illustrating its co-relation to the winding frame and operative parts thereof;

Fig. 5, is a perspective view of a bracket on which the operative parts of my automatic yarn mass stop device are mounted;

F ig. 6, is a detail view of the rock lever on which the winding feeler is mounted Fig. 7, is a diagrammatic view illustrating the operation of my. automatic yarn mass bobbin stop attachment.

I herein show and describe a practical embodiment of my invention as in the form of an attachment to winding frame and ac-l tuating mechanisms well known in the art, although the essential parts of my device and features of my invention may obviously be permanently incorporated in yarn winding apparatus of this class with like results and benefit. The fact however that my automatic stop devicemay be added to existing yarn winding machinery without alteration of the latter, and simply as an adjunctive appliance, is an important practical advantage from a commercial point of view, and in this respect my device is unique and self-contained in that a'single clamping screw or.

equivalent mechanical expedient is all that is necessary to position the same in operative relationship to the bobbin spindle mounts at present in vogue in the art in machines of the character designated.

For this reason, in the, accompanying drawings I show and indicate only'suflicient ofthe winding frame parts and mechanism to illustrate the co-relation of my automatic stop device thereto. Thus R, Fig. 1, represents the usual skein swift or reel from which the silk or other yarn is to be trans ferred to the bobbin B, and A, A, the ordinary longitudinal rear members of the frame of the apparatus to which the usual bobbin spindle supporting brackets a, a, are attached, said longitudinal members A, A, ordinarily consisting of parallel tubing. D,

represents the usual continuously rotatable drive shaft on which the steel drive pulleys d, are rigidly mounted. The'spindle supporting brackets a, a, are formed with the customary notches or recesses a, a, for the reception of the ends of the spindles S, on which the bobbins B, are detachably mounted as heretofore, said spindles S,

being each provided with a preferably non-metallic head or pulley .9, (hereinafter designated as'the spindle head) for contactual engagement with the upper peripheral surface of a metallic drive pulley d, and the construction, arrangement and operation of the parts thus far disclosed be ing essentially the same as heretofore in yarn winding mechanism of this class. J

The operative parts of my automatic stop attachment are mounted on an L-shaped bracket L, secured to the aforesaid longitudinal members A, A, of the frame of the apparatus by means of af'clamping nut C, engaging with a screw 0, the head c,of whichbears against the face of said bracket L, and the shank of which extends through a vertical slot Z, in the upright member of said bracket L, and extends between said longitudinal members A, A, of the frame and engages with the female screw thread formed for the purpose in the aforesaid clamping nut C, as indicated more particu larly in Fig, 1, of the drawings. The slot Z, in the vertical member of the bracket L, provides forthe adjustment of my automatic yarn stop attachment as a unitary device in accordance with the diameter of the bobbin B, to be used in connection therewith, or of the desired fullness of yarn mass thereon.

The forward end of the horizontal member of the supporting bracket L, is bifurcated to accommodate the forward end of the rock lever E, which is fulcrumed thereon. On the forward end of this rock lever E, is mounted a transverse feeler F, for contacting with the under side of the yarn mass on the bobbin B. This feeler i is of a length slightly less than the distance between the end flanges on the bobbin B, so as to be capable of entrance therebetween; and its contactual surface preferably consists of the periphery of a roller pivotally supported between the upturned ends ofa wire stirrup e, or otherwise mounted on the rock lever E, in such manner as to be rotatable on it longitudinal axis, so as to reduce frictional contact with the yarn to a minimum degree while holding the feed thereof taut and even.

To the rear end of the rock lever E, is

pivotally attached a coupling rod h, the

upper end of which is in turn pivotally connected with the crank arm of a rocker member 70, fulcrum mounted on the upper portion of the bracket L. The free end of the crank arm is, of the rocker member 70, is formed with a pendent extension 70 to the lower portion of which the rear end of the brake plate 77, is pivotally connected. The rocker member 7a, is preferably although not necessarily made of wire, in which case the fulcrum end thereof may be extended beyond the bracket L, and bent over to constitute a stop k which, by con tacting with the face of said bracket L, will limit the extent of motion or play of the said rockable member in either direction. The operative parts of my device are so proportioned and arranged that the free end of the brake plate 3), rests continuously upon the rear upper peripheral surface of the drive disc or pulley (Z. The weight of the rear portion of the rock lever E, the coupling Or connection rod 7L, and the crank arm is, and pendent 70 are such as to tend constantly to retract the free end of the brake plate {0, out of contact with the pulley head 8, of the spindle S,the stop 72 however preventing the' collapse of the parts and the withdrawal of said free end of the brake plate 17, from the periphery of the drive pulley d, and maintaining the said parts in what may be designated for convenience as their normal position, with the feeler F, protuberant between the flanges of the bobbin B, presuming the latter to be a fresh bobbin to be filled.

Under these conditions, as the bobbin fills up with the feed of yarn from the reel R, the increase of wind will gradually act upon the feele'r F, to depress the outer end of the rock lever E, thereby raising the rear end thereof and causing the connection rod h, to raise the crank arm 70, and thereby advance the free end of the brake plate 10, until it protrudes between the periphery of the drive disc (Z, and the spindle head 8, in such manner that when the requisite amount of yarn on the bobbin is effected the brake plate 2), will force the said spindle head .9, out of direct contact with said drive wheel (Z, and thereby prevent the further rotation of the spindle S. Thus the winding of yarn is stopped automatically, the yarn mass itself being utilized for the purpose.

Upon the removal of the filled bobbin and its spindl the operative parts of my device automatically, by gravity, return to normal positions and relationship, to resume the functions described upon replacement of spindle and bobbin, and so on continuously without interference with the operation of the winding frame mechanism in any particular.-

By this means I insure uniformity in length of winding on the bobbins, and eliminate the uncertainty incidental to the old method of reliance on the judgment or guess work of the attendant or winder, so called, who has simultaneously to watch and care for a hundred or more bobbins. In other words, the operator is relieved of all responsibility for the length or condition of winding on the bobbin, and the fear of excess of winding is obviated, so that skilled labor may be dispensed with, since the attendant has simply to remove and replace stationary spindles and bobbins at convenience.

will be seen that my automatic bobbin winder stop device is very simple and inexpensive of structure, gears, springs and complication of parts being avoided, and gravity alone being utilized as the actuating power. Furthermore it does not encroach on the winding frame mechanism to which it is attached, or with which it may be incorporated, its action being essentially local in the sense that it concerns only the spindle and bobbin positioned in front of it, and does not impede the insert-ion or removal thereof, in the usual manner. No resetting of the device is required, it being independent and self-contained in this respect; re-

quiring no attention whatsoever from the 1 attendant; and it is entirely out of the way and not subject to contact with extraneous objects.

What I claim as my invention and desire to secure by Letters Patent is,

1. In combination with bobbin spindle drive mechanism of the character designated, an automatic stop device comprising a rock lever, a rotatable yarn mass feeler mounted on said rock lever, and a brake plate connected therewith by intermediate means and adapted to be protruded thereby between the spindle drive wheel and the spindle head by means of the accumulation of yarn mass on the bobbin, substantially in the manner and for the purpose described.

2. In combination with bobbin spindle drive mechanism of the character designated,

an automatic stop device, comprising a rock lever, a rotatable yarn mass feeler mounted on said rock lever, a coupling rod pivotally connecting said rock lever with a rockable crank arm, said rockable crank arm, and a brake plate pivotally connected therewith and adapted to be protruded thereby be tween the spindle drive wheel and the spindle head by means of the accumulation of yarn mass on the bobbin, substantially in the manner and for the purpose described.

3. In combination with bobbin spindle drive mechanism of the character designated, an automatic stop device comprising a rock lever, a rotatable yarn mass feeler consisting of a roller rotatably mounted on said rock lever, and a brake plate connected therewith by intermediate means and adapted to be protruded thereby between the spindle drive wheel and the spindle head by means of the yarn mass on the bobbin, substantially in the manner and for the purpose described.

4:. In combination with bobbin spindle drive mechanism of the character designated, an automatic-stop device comprising a bracket adjustably mounted on the winding frame, a rock lever mounted on said bracket, a rotatable yarn mass feeler mounted on said rock lever, a rockable crank arm, a coupling rod pivotally connecting said rock lever with said rockable crank arm, and a brake plate pivotally connected therewith and adapted to be protruded thereby between the spindle drive wheel and the spindle head by means of the accumulation of yarn mass on the bobbin, substantially in the manner and for the pur ose described.

PHILIP N THANSON.

Witnesses:

JAooB SoNTAG, JOSEPH D. BECHTEL. 

